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The standard reduction potential for Cu...

The standard reduction potential for `Cu^(2+)//Cu` is +0.34 V. Calculate the reducing potential at PH= 14 for the above couple . `(K_SP) ` of `Cu(OH)_(2)` is `1.0 xx10^(-19)`

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pH=14
`implies pOH=0 implies [OH^(-)]=1.0M`
`K_(sp)=10^(-19)=[Cu^(2+)][OH^(-)]^(2) implies [Cu^(2+)]=(10^(-19))/([OH^(-)]^(2))=10^(-19)`
For reaction : `Cu^(2+)+2e^(-)to Cu, E^(@)=0.34V`
`E=E^(@)-(0.0592)/2 log. 1/([Cu^(2+)])=0.34-0.0592/2 log 10^(19) =-0.222V`
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